Stator assembly in cross-pole-phase arrangement and motor

Abstract

The invention relates to the technical field of flat wire motors, in particular to a stator assembly in cross-pole-phase arrangement and a motor. The stator assembly comprises a stator core and a stator winding. The stator core is provided with A stator slots, and A is equal to 24e; the pole number P of the stator winding is equal to 2e; all the stator slots are divided into N pole-phase small units along the circumferential direction of the stator core; each pole-phase small unit comprises six continuous adjacent stator slots; any two adjacent pole-phase small units share two stator slots; wherein N = A / 4. According to the invention, wires in four stator slots of each pole and each phase in the traditional scheme are rearranged in six stator slots, so that the wire connection design selection of the end windings is enriched, the space arrangement design of the end windings is also facilitated, and the height of the end windings can be effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of flat wire motors, and particularly relates to a stator assembly and a motor with a cross-pole-phase arrangement. Background Art

[0002] In domestic new energy vehicle drive motors, the requirements for power density are getting higher and higher, the motor layout space is getting more and more compact, and the NVH (Noise, Vibration, Harshness) performance requirements are getting stricter. However, the end dimensions of mainstream motors are high and cannot meet the requirements. Therefore, motor solutions with high speed, small volume and excellent NVH performance have become the key research directions in the industry.

[0003] In existing flat wire motor solutions, when the number of slots per pole per phase is 4, there are few solutions that can ensure the balanced arrangement of each phase winding under each pole. Moreover, most existing flat wire motor solutions adopt full-pitch windings, and the two ends of the full-pitch stator windings are relatively high, increasing the size of the motor. This affects the overall performance of the motor and also increases the difficulty of the motor production process.

[0004] Moreover, the traditional motor solution is to arrange the winding of the same phase only in their respective pole-phase slot positions, that is, each phase winding is only distributed in 4 consecutive adjacent stator slots corresponding to each pole. For a phase winding, all four stator slots of the same pole-phase are full-slot settings. This results in limited choices of feasible motor solutions.

[0005] In addition, there are few motors with short-pitch windings on the market currently, and the effect of reducing the end height is average, unable to meet the requirements of various motors. Summary of the Invention

[0006] In view of the above problems, the present invention provides a stator assembly with a cross-pole-phase arrangement, and the stator assembly includes a stator core and a stator winding;

[0007] There are A stator slots provided on the stator core, where A = 24e; the number of poles P of the stator winding is 2e; where e is an integer; b rectangular wires are sequentially arranged along the radial direction of the stator core in each stator slot, where b is an even number greater than or equal to 4;

[0008] All the stator slots are divided into N pole-phase small units along the circumferential direction of the stator core; each pole-phase small unit includes 6 consecutive adjacent stator slots; any two adjacent pole-phase small units share two stator slots; where N = A / 4;

[0009] The stator winding is a three-phase winding;

[0010] The 1st pole-phase small unit, the 4th pole-phase small unit, …, the (N - 2)th pole-phase small unit are used to arrange the winding of the first-phase winding of the stator winding; the 2nd pole-phase small unit, the 5th pole-phase small unit, …, the (N - 1)th pole-phase small unit are used to arrange the winding of the second-phase winding of the stator winding; the 3rd pole-phase small unit, the 6th pole-phase small unit, …, the Nth pole-phase small unit are used to arrange the winding of the third-phase winding of the stator winding. Further,

[0011] Further, for a phase winding, the number of wires in the two stator slots located in the middle position of each of the pole-phase small units is b; the number of wires in the four stator slots located on both sides is b / 2; and the wire arrangement positions in the two stator slots on one side and the two stator slots on the other side are in an interleaved state.

[0012] Further, the connection method of the stator winding at one end includes: connecting the No. 1 wire in each stator slot to the No. 1 wire in another stator slot; connecting the c-th wire in each stator slot to the (c + 1)-th wire in another stator slot; connecting the b-th wire in each stator slot to the b-th wire in another stator slot; where 1 < c < b and c is an even number; adopting a combined pitch method;

[0013] The connection method of the stator winding at the other end includes: connecting the d-th wire in each stator slot to the (d + 1)-th wire in another stator slot; where 1 ≤ d < b and d is an odd number; and only adopting a single pitch method with a pitch of 10.

[0014] Further, the combined pitch includes full pitch and short pitch;

[0015] The formula for the full pitch is: I = A / P; where I is the full pitch, A is the number of stator slots, and P is the number of poles of the stator winding;

[0016] The formula for the short pitch is: L = I - K; where L is the short pitch, I is the full pitch, and K is an integer, and 1 ≤ K < 4.

[0017] Further, the lead wire and / or neutral point wire of the stator winding can be arranged at the hairpin end or the welding end.

[0018] The present invention also provides a motor with a cross-pole-phase arrangement, and the motor includes the above-mentioned stator assembly.

[0019] The beneficial effects of the present invention are:

[0020] 1. The stator assembly provided by the embodiment of the present invention arranges the wires of each pole and each phase in the form of pole-phase small units, and arranges the wires of each pole and each phase in the traditional concept across two adjacent pole-phase slots. The present invention rearranges the wires in the four stator slots of each pole and each phase in the traditional solution in six stator slots, enriching the connection design options of the end windings, facilitating the spatial arrangement design of the end windings, and effectively reducing the height of the end windings.

[0021] 2. The stator assembly provided by the present invention is wound in a short pitch, effectively reducing the height of the end windings, reducing the spatial size of the end of the motor winding, and saving copper wire. And using a short pitch winding can weaken the harmonic electromotive force and improve the NVH performance of the motor.

[0022] 3. The outgoing line position of the stator assembly provided by the present invention can be flexibly switched between the hairpin end and the welding end, enriching the winding scheme of the short pitch flat wire motor, and the span at the welding end is consistent with the turning angle, with good manufacturability.

[0023] 4. The number of elements in each branch of each phase winding of the stator winding provided by the present invention is the same, the number of stator slots and the number of layers passed by each branch are the same, the back electromotive force phases of each branch are the same, the magnitudes are the same, and the resistances and inductances of the first and last ends of each branch are the same, realizing the balanced arrangement of the three-phase windings.

[0024] Other features and advantages of the present invention will be described in the following specification, and, in part, will become apparent from the specification or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained by the structure pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 Shows a schematic structural diagram of the stator slots of the embodiment of the present invention;

[0027] Figure 2 Shows a schematic diagram of the first state of the pole-phase small unit of the embodiment of the present invention;

[0028] Figure 3 Shows a schematic diagram of the second state of the pole-phase small unit of the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] An embodiment of the present invention provides a motor with a cross-pole-phase arrangement. The motor includes a stator assembly. The stator assembly includes a stator core and a stator winding. The stator core is generally cylindrical to facilitate accommodating a motor rotor assembly within the stator core. A stator slots are provided on the stator core. The stator slots are arranged in sequence along the circumferential direction of the stator core, presenting an annular array. Among them, A = 24e. The number of poles P of the stator winding is 2e. Among them, e is an integer. The winding of the stator winding uses rectangular wires, and the windings are evenly and symmetrically arranged in the stator slots.

[0031] The stator winding is a three-phase winding.

[0032] Specifically, the stator winding can be divided into an in-slot winding and an end winding. The in-slot winding refers to the part of the rectangular wire within the stator slot, also known as the in-slot wire. The end winding refers to the part of the rectangular wire on both ends of the stator core. The function of the end winding is to pair and connect the rectangular wires at different positions in different stator slots at a certain span to achieve the internal connection of the stator winding. The end windings are distributed on both sides of the stator core, respectively called the hairpin end and the welding end.

[0033] Further, b rectangular wires are sequentially arranged along the radial direction of the stator core in each stator slot, where b is an even number greater than or equal to 4.

[0034] For convenience of description, in the embodiments of the present invention, along the direction from the outer wall of the stator core to the axis of the stator core, the rectangular wires in the same stator slot are respectively numbered, as Figure 1 shown, and are respectively denoted as wire No. 1, wire No. 2,..., wire No. b - 1, and wire No. b.

[0035] Along the circumferential direction of the stator core, the stator slots are sequentially named, and are respectively denoted as stator slot Z1, stator slot Z2, stator slot Z3,..., stator slot ZA - 1, and stator slot ZA. Exemplarily, Z1(1) represents wire No. 1 of stator slot Z1, and Z2(3) represents wire No. 3 of stator slot Z2.

[0036] Further, all stator slots are divided into N pole-phase small units along the circumferential direction of the stator core; each pole-phase small unit includes 6 continuously adjacent stator slots; any two adjacent pole-phase small units share two stator slots; where N = A / 4.

[0037] Exemplarily, the 1st pole-phase small unit includes stator slot No. Z1, stator slot No. Z2, stator slot No. Z3, stator slot No. Z4, stator slot No. Z5, and stator slot No. Z6; the 2nd pole-phase small unit includes stator slot No. Z5, stator slot No. Z6, stator slot No. Z7, stator slot No. Z8, stator slot No. Z9, and stator slot No. Z10; the 3rd pole-phase small unit includes stator slot No. Z9, stator slot No. Z10, stator slot No. Z11, stator slot No. Z12, stator slot No. Z13, and stator slot No. Z14; …; the Nth pole-phase small unit includes stator slot No. ZA-3, stator slot No. ZA-2, stator slot No. ZA-1, stator slot No. ZA, stator slot No. Z1, and stator slot No. Z2.

[0038] The 1st pole-phase small unit, the 4th pole-phase small unit, …, the N-2th pole-phase small unit are used to arrange the winding of the first-phase winding of the stator winding; the 2nd pole-phase small unit, the 5th pole-phase small unit, …, the N-1th pole-phase small unit are used to arrange the winding of the second-phase winding of the stator winding; the 3rd pole-phase small unit, the 6th pole-phase small unit, …, the Nth pole-phase small unit are used to arrange the winding of the third-phase winding of the stator winding.

[0039] Further, for a phase winding, the number of wires in the two stator slots located in the middle position of each pole-phase small unit is b, that is, full-slot setting; the number of wires in the four stator slots located on both sides is b / 2, that is, half-slot setting; and the wire arrangement positions in the two stator slots on one side and the two stator slots on the other side are in an interleaved state.

[0040] For example, as Figure 2 shown, are the six stator slots of the 1st pole-phase small unit; at most 8 wires can be arranged in each stator slot, that is, b = 8. Among them, 8 wires are respectively arranged in the middle Z3 and Z4 stator slots, which is a full-slot setting. 4 wires are respectively arranged in the left Z1 and Z2 stator slots, which is a half-slot setting; the specific wire positions are wire No. 1, wire No. 3, wire No. 5, and wire No. 7. 4 wires are respectively arranged in the right Z5 and Z6 stator slots, which is a half-slot setting; the specific wire positions are wire No. 2, wire No. 4, wire No. 6, and wire No. 8.

[0041] Another example, as Figure 3As shown, there are six stator slots in the second pole-phase small unit; at most 8 wires can be arranged in each stator slot, that is, b = 8. Among them, 8 wires are respectively arranged in the middle Z7 stator slot and Z8 stator slot, which are full-slot settings. 4 wires are respectively arranged in the left Z5 stator slot and Z6 stator slot, which are half-slot settings; the specific wire positions are the 2nd wire, 4th wire, 6th wire and 8th wire. 4 wires are respectively arranged in the right Z9 stator slot and Z10 stator slot, which are half-slot settings; the specific wire positions are the 1st wire, 3rd wire, 5th wire and 7th wire.

[0042] If designed according to the traditional pole-phase slot position design method, the number of slots per pole per phase is 4, and the windings of the same phase are only arranged in four adjacent stator slots of each pole. The stator assembly provided by the embodiment of the present invention arranges the wires per pole per phase in the way of pole-phase small units, and arranges the wires per pole per phase in the traditional concept across two adjacent pole-phase slot positions. The present invention rearranges the wires in the four stator slots per pole per phase in the traditional scheme in six stator slots, enriching the connection design options of the end windings, and also facilitating the spatial arrangement design of the end windings, and can effectively reduce the height of the end windings.

[0043] Specifically, two rectangular conductors in the slot winding are connected through a hairpin end or a welding end. Along the circumferential direction of the stator core, the number of stator slots plus one between these two rectangular conductors represents the span of these two rectangular conductors at the hairpin end or the welding end.

[0044] Further, the connection method of the stator winding at one end includes: the 1st wire in each stator slot is connected to the 1st wire in another stator slot; the cth wire in each stator slot is connected to the (c + 1)th wire in another stator slot; the bth wire in each stator slot is connected to the bth wire in another stator slot; where 1 < c < b, and c is an even number; a combined span method is adopted;

[0045] The connection method of the stator winding at the other end includes: the dth wire in each stator slot is connected to the (d + 1)th wire in another stator slot; where 1 ≤ d < b, and d is an odd number; and only a single span method with a span of 10 is adopted.

[0046] Specifically, the combined span includes full pitch and short pitch.

[0047] The calculation formula for the full pitch is: I = A / P; where I is the full pitch, A is the number of stator slots, and P is the number of poles of the stator winding;

[0048] The calculation formula for the short pitch is: L = I - K; where L is the short pitch, I is the full pitch, K is an integer, and 1 ≤ K < 4.

[0049] The stator assembly provided by the present invention is arranged according to short-pitch winding, effectively reducing the height of the end winding, reducing the spatial dimension of the motor winding end, and saving copper wire. Moreover, the short-pitch winding can weaken the harmonic electromotive force and improve the NVH performance of the motor.

[0050] Furthermore, the lead wire and / or star point wire of the stator winding can be arranged at the hairpin end or the welding end. When the stator assembly leads out wires at the hairpin end, the lead wires and star point wires of the same branch at the original welding end are connected, and any one hairpin wire at the hairpin end is divided into two I-pin wires. Any one of the I-pin wires can be used as the lead wire, and the other I-pin wire can be used as the star point wire. The wire outlet position of the stator assembly provided by the present invention can be flexibly switched between the hairpin end and the welding end, enriching the winding scheme of the short-pitch flat wire motor, and the span and turning angle at the welding end are the same, with good manufacturability.

[0051] For each phase winding of the stator winding provided by the present invention, the number of elements in each branch is the same, the number of stator slots and layers passed by each branch are the same, the back electromotive force phases of each branch are the same, the magnitudes are the same, and the resistances and inductances of the first and last ends of each branch are the same, realizing the balanced arrangement of the three-phase windings.

[0052] Embodiment 1

[0053] Taking a 72-slot, 6-pole, 6-layer, 3-branch flat wire motor as an example for illustration, that is, the number of stator slots A of the stator assembly is 72, the number of poles P is 6, the number of branches of each phase winding is 3, and the number of rectangular wires b in each stator slot is 6. The wire outlet position of the stator winding is at the welding end.

[0054] The connection mode of the stator winding at the hairpin end includes: connecting the No. 1 wire in each stator slot with the No. 1 wire in another stator slot; connecting the No. c wire in each stator slot with the No. c + 1 wire in another stator slot; connecting the No. 6 wire in each stator slot with the No. 6 wire in another stator slot; where 1 < c < 6 and c is an even number; adopting a combined span mode of 9, 10, 11, and 12;

[0055] The connection mode of the stator winding at the welding end includes: connecting the No. d wire in each stator slot with the No. d + 1 wire in another stator slot; where 1 ≤ d < 6 and d is an odd number; and only adopting a single span mode with a span of 10.

[0056] The stator winding is divided into three-phase windings of U phase, V phase, and W phase. Among them, the U-phase winding is composed of three branches, namely U1 branch, U2 branch, and U3 branch. The specific winding paths are as follows:

[0057] The bypass path of branch U1 is: Z35(1) → Z26(1) → Z16(2) → Z26(3) → Z16(4) → Z26(5) → Z16(6) → Z28(6) → Z38(5) → Z28(4) → Z18(3) → Z28(2) → Z38(1) → Z49(1) → Z39(2) → Z49(3) → Z39(4) → Z49(5) → Z39(6) → Z51(6) → Z61(5) → Z51(4) → Z61(3) → Z51(2) → Z61(1) → Z72(1) → Z62(2) → Z72(3) → Z62(4) → Z72(5) → Z62(6) → Z2(6) → Z12(5) → Z2(4) → Z12(3) → Z2(2) → Z12(1) → Z23(1) → Z13(2) → Z23(3) → Z13(4) → Z23(5) → Z13(6) → Z25(6) → Z35(5) → Z25(4) → Z35(3) → Z25(2).

[0058] The bypass path of branch U2 is: Z36(1) → Z47(1) → Z37(2) → Z47(3) → Z37(4) → Z47(5) → Z37(6) → Z49(6) → Z59(5) → Z49(4) → Z59(3) → Z49(2) → Z59(1) → Z50(1) → Z40(2) → Z50(3) → Z40(4) → Z50(5) → Z40(6) → Z52(6) → Z62(5) → Z52(4) → Z62(3) → Z52(2) → Z62(1) → Z1(1) → Z63(2) → Z1(3) → Z63(4) → Z1(5) → Z63(6) → Z3(6) → Z13(5) → Z3(4) → Z13(3) → Z3(2) → Z13(1) → Z24(1) → Z14(2) → Z24(3) → Z14(4) → Z24(5) → Z14(6) → Z26(6) → Z36(5) → Z26(4) → Z36(3) → Z26(2).

[0059] The bypass path of branch U3 is: Z37(1) → Z48(1) → Z38(2) → Z48(3) → Z38(4) → Z48(5) → Z38(6) → Z50(6) → Z60(5) → Z50(4) → Z60(3) → Z50(2) → Z60(1) →

[0060] Z71(1) → Z61(2) → Z71(3) → Z61(4) → Z71(5) → Z61(6) → Z1(6) → Z11(5) → Z1(4)

[0061] →Z11(3)→Z1(2)→Z11(1)→Z2(1)→Z64(2)→Z2(3)→Z64(4)→Z2(5)→Z64(6)→Z4(6)→Z14(5)→Z4(4)→Z14(3)→Z4(2)→Z14(1)→Z25(1)→Z15(2)→Z25(3)→Z15(4)→Z25(5)→Z15(6)→Z27(6)→Z37(5)→Z27(4)→Z37(3)→Z27(2).

[0062] According to the above winding path design, the number of elements in each branch of each phase winding of the stator winding is the same, the number of stator slots and layers passed by each branch are the same, the back electromotive force phases of each branch are the same, the magnitudes are the same, and the resistances and inductances of the head and tail ends of each branch are the same, realizing the balanced arrangement of the three-phase windings.

[0063] It should be noted that the winding rules of the V-phase and W-phase windings are the same as those of the U-phase winding, and they are symmetrically and evenly distributed on the stator. No examples will be given here. In addition, any connection point of the U1, U2, and U3 branches can be disconnected according to the position of the lead-out wire interface as the lead-out wire.

[0064] Embodiment 2

[0065] Based on Embodiment 1, in this embodiment, the lead-out position is changed from the welding end to the hairpin end. Connect the lead-out wire and the star point wire of the same branch at the original welding end. Divide any one of the hairpin wires at the hairpin end into two I-pin wires, and any one of the I-pin wires can be used as the lead-out wire, and the other I-pin wire is used as the star point wire. The specific winding path of the U-phase winding after the lead-out position is adjusted is as follows:

[0066] The winding path of the U1 branch is: Z49(1)→Z39(2)→Z49(3)→Z39(4)→Z49(5)→Z39(6)→Z51(6)→Z61(5)→Z51(4)→Z61(3)→Z51(2)→Z61(1)→Z72(1)→

[0067] Z62(2)→Z72(3)→Z62(4)→Z72(5)→Z62(6)→Z2(6)→Z12(5)→Z2(4)→Z12(3)

[0068] →Z2(2)→Z12(1)→Z23(1)→Z13(2)→Z23(3)→Z13(4)→Z23(5)→Z13(6)→Z25(6)→Z35(5)→Z25(4)→Z35(3)→Z25(2)→Z35(1)→Z26(1)→Z16(2)→Z26(3)→Z16(4)→Z26(5)→Z16(6)→Z28(6)→Z38(5)→Z28(4)→Z18(3)→Z28(2)→Z38(1).

[0069] The winding path of branch U2 is: Z50(1)→Z40(2)→Z50(3)→Z40(4)→Z50(5)→

[0070] Z40(6)→Z52(6)→Z62(5)→Z52(4)→Z62(3)→Z52(2)→Z62(1)→Z1(1)→Z63(2)

[0071] →Z1(3)→Z63(4)→Z1(5)→Z63(6)→Z3(6)→Z13(5)→Z3(4)→Z13(3)→Z3(2)→Z13(1)→Z24(1)→Z14(2)→Z24(3)→Z14(4)→Z24(5)→Z14(6)→Z26(6)→Z36(5)→Z26(4)→Z36(3)→Z26(2)→Z36(1)→Z47(1)→Z37(2)→Z47(3)→Z37(4)→Z47(5)→Z37(6)→Z49(6)→Z59(5)→Z49(4)→Z59(3)→Z49(2)→Z59(1).

[0072] The winding path of branch U3 is: Z48(1)→Z38(2)→Z48(3)→Z38(4)→Z48(5)→Z38(6)→Z50(6)→Z60(5)→Z50(4)→Z60(3)→Z50(2)→Z60(1)→Z71(1)→

[0073] Z61(2)→Z71(3)→Z61(4)→Z71(5)→Z61(6)→Z1(6)→Z11(5)→Z1(4)→Z11(3)

[0074] →Z1(2)→Z11(1)→Z2(1)→Z64(2)→Z2(3)→Z64(4)→Z2(5)→Z64(6)→Z4(6)→Z14(5)→Z4(4)→Z14(3)→Z4(2)→Z14(1)→Z25(1)→Z15(2)→Z25(3)→Z15(4)→Z25(5)→Z15(6)→Z27(6)→Z37(5)→Z27(4)→Z37(3)→Z27(2)→Z37(1).

[0075] The stator windings led out at the card issuing end also meet the conditions that the back electromotive force phases of each branch are the same, the magnitudes are the same, and the resistances and inductances of the first and last ends of each branch are the same, realizing the balanced arrangement of the three-phase windings.

[0076] It should be noted that the winding rules of the V-phase and W-phase windings are the same as those of the U-phase winding, and they are symmetrically and evenly distributed on the stator, so no examples will be given here.

[0077] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stator assembly with a cross-pole-phase arrangement, characterized in that, the stator assembly includes a stator core and a stator winding; there are A stator slots provided on the stator core, where A = 24e; the number of poles P of the stator winding is 2e; where e is an integer; b rectangular wires are sequentially arranged along the radial direction of the stator core in each stator slot, where b is an even number greater than or equal to 4; all the stator slots are divided into N pole-phase small units along the circumferential direction of the stator core; each pole-phase small unit includes 6 continuously adjacent stator slots; any two adjacent pole-phase small units share two stator slots; where N = A / 4; the stator winding is a three-phase winding; The 1st pole-phase small unit, the 4th pole-phase small unit,..., the (N - 2)th pole-phase small unit are used to arrange the winding of the first-phase winding of the stator winding; the 2nd pole-phase small unit, the 5th pole-phase small unit,..., the (N - 1)th pole-phase small unit are used to arrange the winding of the second-phase winding of the stator winding; the 3rd pole-phase small unit, the 6th pole-phase small unit,..., the Nth pole-phase small unit are used to arrange the winding of the third-phase winding of the stator winding.

2. A stator assembly with a cross-pole-phase arrangement according to claim 1, characterized in that, For one-phase winding, the number of wires in the two stator slots located in the middle position of each pole-phase small unit is b; the number of wires in the four stator slots located on both sides is b / 2; and the wire arrangement positions in the two stator slots on one side and the two stator slots on the other side are in an interleaved state.

3. A stator assembly with a cross-pole-phase arrangement according to claim 2, characterized in that, The connection method of the stator winding at one end includes: the No. 1 wire in each stator slot is connected to the No. 1 wire in another stator slot; the No. c wire in each stator slot is connected to the (c + 1)th wire in another stator slot; the No. b wire in each stator slot is connected to the No. b wire in another stator slot; where 1 < c < b and c is an even number; adopting a combined pitch method; The connection method of the stator winding at the other end includes: the No. d wire in each stator slot is connected to the (d + 1)th wire in another stator slot; where 1 ≤ d < b and d is an odd number; and only adopting a single pitch method with a pitch of 10.

4. A stator assembly with a cross-pole-phase arrangement according to claim 3, characterized in that, The combined pitch includes full pitch and short pitch; The formula for the full pitch is: I = A / P; where I is the full pitch, A is the number of stator slots, and P is the number of poles of the stator winding; The formula for the short pitch is: L = I - K; where L is the short pitch, I is the full pitch, K is an integer, and 1 ≤ K < 4.

5. A stator assembly with a cross-pole-phase arrangement according to claim 3, characterized in that, The lead wire and / or neutral point wire of the stator winding can be arranged at the hairpin end or the welding end.

6. A motor with a cross-pole-phase arrangement, characterized in that, the motor includes any one of the stator assemblies in claims 1 - 5.

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